TL;DR- If you've played a Umai Neko game or are not a fan of grind, you can safely skip this game.
I found this fun for a bit, but it plays mostly like previous Umai Neko games. I haven't played all of them, but of the ones I've played this is very, very familiar. All enemies have some way of cheesing them, so there isn't really any challenge to them once you've figured that out (e.g. crawling enemies you can either low attack if there's one or two or jump special if there's a lot in the area/there are any other enemies in the area to worry about, enemies that stay away can be dashed at or neutral/dash specialled, etc). Higher difficulties are really just exploiting that cheese and making sure your stats are good enough that you're not one-shotted if you mess up and that you do more than 1 damage.
Because I haven't played them all, I don't know if the gacha system is unique to this game, but it's very easily the worst part of it to me. You're encouraged to play the game constantly at the highest difficulty to get more presents. Each present can either clothing that increase/decreases your stats or gems to level up said clothing. The game says you need 2 of a clothing item in order to level up, but in practice you need an additional one since the game does in as [acquire item, x1, x2, etc]. You can't level the clothes up until you hit x2. You're encouraged to level up your clothes since a level 2 version of the first panties you get have better stats than even the last set you get. So the game devolves into a terrible grind for presents (since there are red present, Big red presents that have better odds of getting clothes, orange presents, and Big orange presents) or cash to buy the present from the shop. You're not going to want to buy presents from the shop since stages give you so little. You're better served using them to level up.
And as of .141, there aren't really any lewds. The crawlers will fuck you on knock down and then there's game over lewds. That's it currently. And even the game over lewds are a grind since there's 3 different versions based on your level of dress when you give up. And to get undressed is a bit counter-intuitive since you have to hit 0 HP, get up, then hope to get hit again before you regen too much HP. Lewds in general feels very much like an after thought in this game.
EDIT- Protip: Crouching enemies can be hit with your Jump Special attack (the one that looks like a downward drill). It makes those enemies a lot less of a pain in the ass to fight